You have to shift down when you climb up steep hills.

开车爬陡峭的山坡时,你得换低速挡.

《简明英汉词典》

He had to shift down into second to make the hill.

他必须换到二档来爬过那个山头.

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As you slow to a stop, shift down to a low , starting gear.

当你慢下车来要停车的时候, 把档位置调至起动档.

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If driving a car with a manual transmission, shift up early and shift down late!

如果开的是手动档的车, 早点换快挡,晚点换慢挡!

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